#55509D
Closest named color: Twilight (#4E518B). oklch(47.5% 0.121 283.7), rgb(85, 80, 157).
Aa
White text reads best on this color (6.95:1).
About this color
#55509D is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.121 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.032 away. White text reads best on it, at 6.95:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.02:1 |
| White text | 6.95:1 |
Values
| HEX | #55509D |
| RGB | rgb(85, 80, 157) |
| HSL | hsl(244, 32%, 46%) |
| OKLCH | oklch(47.5% 0.121 283.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #55509D | 6.95:1 | AA | Lc -88.9 | Fine for body text |
| Black text on #55509D | 3.02:1 | AA large text | Lc 20.1 | Dividers and decoration only |
| #55509D text on white | 6.95:1 | AA | Lc 83.9 | Fine for body text |
| #55509D text on black | 3.02:1 | AA large text | Lc -18.1 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E8E9F5
oklch(93.7% 0.016 282.3)
-
Step 200
200
#D6D7EF
oklch(88.6% 0.033 283.8)
-
Step 300
300
#BBBCE6
oklch(80.8% 0.059 283.9)
-
Step 400
400
#9999D9
oklch(70.7% 0.093 283.8)
-
Step 500
500
#817ECF
oklch(63% 0.12 284.1)
-
Step 600
600
#6B66BC
oklch(55.5% 0.131 283.9)
-
Step 700
700 (this color)
#55509D
oklch(47.5% 0.121 283.7)
-
Step 800
800
#494683
oklch(42.8% 0.099 283.6)
-
Step 900
900
#3D3B69
oklch(37.7% 0.077 284)
-
Step 950
950
#23233E
oklch(27% 0.05 282.6)
#55509D with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #305CA0 | 0.052 |
| Deuteranopia (no green cones) | #2C579B | 0.053 |
| Tritanopia (no blue cones) | #3E606F | 0.103 |
| Achromatopsia (no color) | #595959 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55509D
#55509D
oklch(47.5% 0.121 283.7)
- #665E00
#665E00
oklch(47.4% 0.1 103.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #55509D, closest first.
No curated palette has a color within ΔE 0.04 of #55509D.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.032
- Blueberry #464196 ΔE 0.049
- Dusky Blue #475F94 ΔE 0.049
- Denim Blue #3B5B92 ΔE 0.050
- Dusk #4E5481 ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.061
- Dusk Blue #26538D ΔE 0.066
- Iris #6258C4 ΔE 0.067
Use #55509D in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.